Isaiah
Isaiah 30:26ESV·traditional attribution

Moreover, the light of the moon will be as the light of the sun, and the light of the sun will be sevenfold, as the light of seven days, in the day when the LORD binds up the brokenness of his people, and heals the wounds inflicted by his blow.

John Calvin Reformed @genevareformer

26. And the light of the moon shall be. The Prophet was not satisfied with describing an ordinary state of prosperity, without adding something extraordinary; for he says that the Lord will go beyond the course of nature in this kindness and liberality.

Matthew Henry Presbyterian @wholebiblehenry

The closing words of the foregoing paragraph (You shall be left as a beacon upon a mountain) some understand as a promise that a remnant of them should be reserved as monuments of mercy; and here the prophet tells them what good times should succeed these calamities.

Commenting on Isaiah 30:18-26

John Gill Reformed Baptist @doctorgill

Moreover the light of the moon shall be as the light of the sun,.... An hyperbolical expression, used to set forth the exceeding great light of the Gospel under the dispensation of it, which would as far exceed the light of the former dispensation, comparable to the moon, as the light of the sun exceeds the light of the moon; as also that great degree...